1451241221 has 8 divisors (see below), whose sum is σ = 1463045760. Its totient is φ = 1439484928.

The previous prime is 1451241217. The next prime is 1451241359. The reversal of 1451241221 is 1221421541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1451241221 - 2² = 1451241217 is a prime.

It is a super-2 number, since 2×1451241221² = 4212202163059141682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451243221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49610 + ... + 73236.

It is an arithmetic number, because the mean of its divisors is an integer number (182880720).

Almost surely, 2^1451241221 is an apocalyptic number.

It is an amenable number.

1451241221 is a deficient number, since it is larger than the sum of its proper divisors (11804539).

1451241221 is a wasteful number, since it uses less digits than its factorization.

1451241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24123.

The product of its digits is 640, while the sum is 23.

The square root of 1451241221 is about 38095.1600731641. The cubic root of 1451241221 is about 1132.1740641925.

Adding to 1451241221 its reverse (1221421541), we get a palindrome (2672662762).

The spelling of 1451241221 in words is "one billion, four hundred fifty-one million, two hundred forty-one thousand, two hundred twenty-one".